4
timediff関数が期待どおりに機能しません。次の例では、1年間の差を秒単位で計算しようとしています。timediffの予期しない結果
mysql>SELECT 366*24*60*60 AS expected;
+----------+
| expected |
+----------+
| 31622400 |
+----------+
1 row in set (0.00 sec)
mysql>SELECT ABS(UNIX_TIMESTAMP('2000:01:01 00:00:00') - UNIX_TIMESTAMP('2001:01:01 00:00:00'));
+------------------------------------------------------------------------------------+
| ABS(UNIX_TIMESTAMP('2000:01:01 00:00:00') - UNIX_TIMESTAMP('2001:01:01 00:00:00')) |
+------------------------------------------------------------------------------------+
| 31622400 |
+------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql>SELECT TIME_TO_SEC(TIMEDIFF('2000:01:01 00:00:00', '2001:01:01 00:00:00'));
+---------------------------------------------------------------------+
| TIME_TO_SEC(TIMEDIFF('2000:01:01 00:00:00', '2001:01:01 00:00:00')) |
+---------------------------------------------------------------------+
| -3020399 |
+---------------------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)
Warning (Code 1292): Truncated incorrect time value: '-8784:00:00'
私にも同様の問題がありました。 TIMESTAMPDIFFではなくTIMEDIFFが私の問題を解決しました! – Selah